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C8051F310/1/2/3/4/5/6/7
168
Rev. 1.6
Table 15.5. Timer Settings for Standard Baud Rates Using an External 11.0592 MHz
Oscillator
Frequency: 11.0592 MHz
Target
Baud Rate
(bps)
Baud Rate
% Error
Oscilla-
tor Divide
Factor
Timer Clock
Source
SCA1-SCA0
(pre-scale
select)*
T1M*
Timer 1
Reload Value
(hex)
230400
0.00%
48
SYSCLK
XX
1
0xE8
115200
0.00%
96
SYSCLK
XX
1
0xD0
57600
0.00%
192
SYSCLK
XX
1
0xA0
28800
0.00%
384
SYSCLK
XX
1
0x40
14400
0.00%
768
SYSCLK / 12
00
0
0xE0
9600
0.00%
1152
SYSCLK / 12
00
0
0xD0
2400
0.00%
4608
SYSCLK / 12
00
0
0x40
1200
0.00%
9216
SYSCLK / 48
10
0
0xA0
230400
0.00%
48
EXTCLK / 8
11
0
0xFD
115200
0.00%
96
EXTCLK / 8
11
0
0xFA
57600
0.00%
192
EXTCLK / 8
11
0
0xF4
28800
0.00%
384
EXTCLK / 8
11
0
0xE8
14400
0.00%
768
EXTCLK / 8
11
0
0xD0
9600
0.00%
1152
EXTCLK / 8
11
0
0xB8
X = Don’t care
*Note: SCA1–SCA0 and T1M bit definitions can be found in
Section 17.1.
Table 15.6. Timer Settings for Standard Baud Rates Using an External 3.6864 MHz
Oscillator
Frequency: 3.6864 MHz
Target
Baud Rate
(bps)
Baud
Rate%
Error
Oscilla-
tor Divide
Factor
Timer Clock
Source
SCA1-SCA0
(pre-scale
select)*
T1M*
Timer 1
Reload
Value (hex)
230400
0.00%
16
SYSCLK
XX
1
0xF8
115200
0.00%
32
SYSCLK
XX
1
0xF0
57600
0.00%
64
SYSCLK
XX
1
0xE0
28800
0.00%
128
SYSCLK
XX
1
0xC0
14400
0.00%
256
SYSCLK
XX
1
0x80
9600
0.00%
384
SYSCLK
XX
1
0x40
2400
0.00%
1536
SYSCLK / 12
00
0
0xC0
1200
0.00%
3072
SYSCLK / 12
00
0
0x80
230400
0.00%
16
EXTCLK / 8
11
0
0xFF
115200
0.00%
32
EXTCLK / 8
11
0
0xFE
57600
0.00%
64
EXTCLK / 8
11
0
0xFC
28800
0.00%
128
EXTCLK / 8
11
0
0xF8
14400
0.00%
256
EXTCLK / 8
11
0
0xF0
9600
0.00%
384
EXTCLK / 8
11
0
0xE8
X = Don’t care
*Note: SCA1–SCA0 and T1M bit definitions can be found in
Section 17.1.